The Galaxy S4 locked screen prevents Galaxy S4 from unwanted operation when not in use and also allows you to add convenient widgets.
Locking and unlocking Galaxy S4
Pressing the Power button turns off the screen and puts Galaxy S4 into lock mode. Galaxy S4 automatically gets locked if it is not used for a specified period.
To unlock Galaxy S4, press the Power button or the Home button and flick your finger in any direction within the unlock screen area at the lower part of the screen.
Adding widgets on Galaxy S4 locked screen
To use widgets when the Galaxy S4 screen is locked, on the Applications screen, tap Settings → My device → Lock screen, and then tick Multiple widgets.
You cannot use widgets on the locked screen in easy mode.
Drag the widgets panel down to expand it. Scroll right to the last page, tap , and then select a widget to add to the locked screen.
Rearranging panels on Galaxy S4 locked screen
Moving a panel
Drag the widgets panel down, scroll left or right, tap and hold a panel preview, and then drag it to a new location.
Removing a panel
Drag the widgets panel down, scroll left or right, tap and hold a panel preview, and then drag it to the rubbish bin at the top of the screen.